A boxing bag, more commonly known as a punching bag, is mainly used for throwing punches repeatedly. It is made of a sturdy material. It is mostly used for practicing punches or for relieving stress. Boxing bags are used in many combat sports such taekwondo, karate etc to improve upon technique and also to gain strength. Professional boxers use boxing bags for training and they are now used commonly world-wide for this reason. Amateurs are more interested in boxing as a form of fitness and with increased interest in physical fitness; boxing bags are gaining popularity everywhere.

Punching bags are usually filled with grains, sand or any other sort of gravel type material and then they affixed to a stand or hung from the ceiling using a strong chain. The main advantage with a punching bag is that it can be fixed anywhere, even in the corner of your house and does not require much space or maintenance.

There are three basic types of boxing bags. The small one, known as the speed bag, is anchored at the top and is used to develop hand speed, rhythm and coordination. The largest, known as the heavy bag, is cylindrical in shape and is used to develop power and improve upon foot-work. The third type, usually suspended from the ceiling, helps develop timing.

Canvas or polyvinyl is generally used to make the outside covering of the large boxing bags. A striking bag is made using leather. It has two leather balloons placed one inside the other and the inner balloon is filled with air. A heavy, coated synthetic thread, typically nylon, is used to stitch the pieces of leather together. The leather for the bag is usually made from goat-skin. The skin goes through a laborious process of tanning and drying and then it is ready to be used.

In order to make sure the bags are done properly, manufacturers test the products at specific time intervals. The bags undergo rigorous tests that verify the strength of the seams and the material. The manufacturers have to make sure that the finished product is prepared as per specifications and that it can withstand the pressure it is exposed to.